Looks sharp enough to me; I think a slightly greater dof would be nicer but I note the camera is already at 1/100th and ISO 100, so you'd be looking at slower shutter and/or adding extra light.

Great; looks very natural

Beautiful animal.

Very interesting closeup. I have no snake expertise but would suggest a few mintes observation first to get a feel for tongue behaviour (you may not have had that luxury) and then shoot continuous mode after anticipating/predicting tongue emergence.

This one for me in pure image terms. I like this and the other wide open shot for their exclusion of the prison setting, and the eye beats the mouth for me.

Looks to be quite an engrossing place - modelling the solar system or is that reading too much into it?

Skilful comp. to fully exploit the shapes.

This structure keeps on giving terrific light/shadow displays.

If this was mine ... I'd only include the upper area foliage/trunks/branches.

Verticals ftw.